DSP28335 ecap使用

来源：互联网发布：微信订餐软件编辑：程序博客网时间：2024/05/18 03:54

输入捕获有4级捕获，最多可以得到4个捕获时间，捕获记性可以任意配置

可用于测速，测脉冲周期，频率，占空比等

cap.c

#include "cap.h"

void InitCap(void)
{
InitECap5Gpio();
InitECap6Gpio();
SetCap5();
SetCap6();
}

void SetCap5(void)
{
ECap5Regs.ECCTL1.bit.CAP1POL = EC_RISING;
ECap5Regs.ECCTL1.bit.CAP2POL = EC_FALLING; //EC_RISING;
ECap5Regs.ECCTL1.bit.CAP3POL = EC_RISING;
ECap5Regs.ECCTL1.bit.CAP4POL = EC_FALLING;
ECap5Regs.ECCTL1.bit.CTRRST1 = EC_ABS_MODE;
ECap5Regs.ECCTL1.bit.CTRRST2 = EC_ABS_MODE;
ECap5Regs.ECCTL1.bit.CTRRST3 = EC_ABS_MODE;
ECap5Regs.ECCTL1.bit.CTRRST4 = EC_ABS_MODE;
ECap5Regs.ECCTL1.bit.CAPLDEN = EC_ENABLE;
ECap5Regs.ECCTL1.bit.PRESCALE = EC_DIV1;
ECap5Regs.ECCTL2.bit.CAP_APWM = EC_CAP_MODE;
ECap5Regs.ECCTL2.bit.CONT_ONESHT = EC_CONTINUOUS; //连续捕获
ECap5Regs.ECCTL2.bit.SYNCO_SEL = EC_SYNCO_DIS;
ECap5Regs.ECCTL2.bit.SYNCI_EN = EC_DISABLE;
ECap5Regs.ECEINT.all=0x0000;//stop all interrupt
ECap5Regs.ECCLR.all=0xFFFF;//clare all flag
ECap5Regs.ECCTL2.bit.TSCTRSTOP = EC_RUN;// 启动
ECap5Regs.ECEINT.bit.CEVT4=1;// Enable cevt4 interrupt //第4个捕获事件发生时，产生中断
}

void SetCap6(void)
{
ECap6Regs.ECCTL1.bit.CAP1POL = EC_FALLING;
ECap6Regs.ECCTL1.bit.CAP2POL = EC_FALLING;
ECap6Regs.ECCTL1.bit.CAP3POL = EC_FALLING;
ECap6Regs.ECCTL1.bit.CAP4POL = EC_FALLING;
ECap6Regs.ECCTL1.bit.CTRRST1 = EC_ABS_MODE;
ECap6Regs.ECCTL1.bit.CTRRST2 = EC_ABS_MODE;
ECap6Regs.ECCTL1.bit.CTRRST3 = EC_ABS_MODE;
ECap6Regs.ECCTL1.bit.CTRRST4 = EC_ABS_MODE;
ECap6Regs.ECCTL1.bit.CAPLDEN = EC_ENABLE;
ECap6Regs.ECCTL1.bit.PRESCALE = EC_DIV1;
ECap6Regs.ECCTL2.bit.CAP_APWM = EC_CAP_MODE;
ECap6Regs.ECCTL2.bit.CONT_ONESHT = EC_CONTINUOUS;
ECap6Regs.ECCTL2.bit.SYNCO_SEL = EC_SYNCO_DIS;
ECap6Regs.ECCTL2.bit.SYNCI_EN = EC_DISABLE;
ECap6Regs.ECEINT.all=0x0000;//stop all interrupt
ECap6Regs.ECCLR.all=0xFFFF;//clare all flag
ECap6Regs.ECCTL2.bit.TSCTRSTOP = EC_RUN;// 启动
ECap6Regs.ECEINT.bit.CEVT4=1;// Enable cevt4 interrupt
}

Uint32 t1,t2,t3,t4,T1,T2;
interrupt void ISRCap5(void)
{
// Acknowledge this interrupt to receive more interrupts from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;
ECap5Regs.ECCLR.all=0xFFFF;//clare all flag
t1= ECap5Regs.CAP1;
t2= ECap5Regs.CAP2;
t3= ECap5Regs.CAP3;
t4= ECap5Regs.CAP4;
T1=t2-t1;T2=t3-t1;
}

Uint32 t5,t6,t7,t8,T3,T4;
interrupt void ISRCap6(void)
{
// Acknowledge this interrupt to receive more interrupts from group 1
PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;
ECap6Regs.ECCLR.all=0xFFFF;//clare all flag
t5= ECap6Regs.CAP1;
t6= ECap6Regs.CAP2;
t7= ECap6Regs.CAP3;
t8= ECap6Regs.CAP4;
T3=t6-t5;T4=t8-t7;

}

cap.h

#ifndef CAP_H_
#define CAP_H_

#include "main.h"

extern Uint32 t1,t2,t3,t4,T1,T2;
extern Uint32 t5,t6,t7,t8,T3,T4;

void InitCap(void);
void SetCap5(void);
void SetCap6(void);

interrupt void ISRCap5(void);
interrupt void ISRCap6(void);

#endif /* CAP_H_ */

main函数中要调用的

InitCap(); //输入捕获初始化

PieVectTable. ECAP5_INT = &ISRCap5; //输入捕获5

IER |= M_INT4; //输入捕获
PieVectTable. ECAP6_INT = &ISRCap6; //输入捕获6

PieCtrlRegs.PIEIER4.bit.INTx5 = 1; //输入捕获5中断
PieCtrlRegs.PIEIER4.bit.INTx6 = 1; //输入捕获6中断

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